Razorbill, Alca torda "Tordmule / Alca torda" by AnnaKika via Flickr, Creative Commons Attribution.	Little Auk, Alle alle "Little Auks" by Alastair Rae via Flickr, Creative Commons Attribution ShareAlike.
Black Guillemot, Cepphus grylle "Black Guillemot - Cepphus grylle - Teista" by Omarrun via Flickr, Creative Commons Attribution.	Atlantic Puffin, Fratercula arctica Rubund Creative Commons Attribution ShareAlike.
Common Guillemot, Uria aalge "Common Murre" by Dawn Endico via Flickr, Creative Commons Attribution ShareAlike.	Brünnich's Guillemot, Uria lomvia "Brünnich's Guillemot" by Alastair Rae via Flickr, Creative Commons Attribution ShareAlike.
Black-headed Gull, Chroicocephalus ridibundus Sarah Berger ©.	Swallow-tailed Gull, Creagrus furcatus "Swallow-tail gulls, Espanola, Punta Suarez" by Putneymark via Flickr, Creative Commons Attribution ShareAlike.
Little Gull, Hydrocoloeus minutus "Little Gull (Larus minutus)" by Dominic sherony via Flickr, Creative Commons Attribution ShareAlike.	Ichthyaetus audouinii "Gavines corses (larus audouinii) - Feliz año nuevo - Happy new year - Feliç any nou" by Ferran pestaña via Flickr, Creative Commons Attribution ShareAlike.
European Herring Gull, Larus argentatus "IMG_4819" by Gulli H via Flickr, Creative Commons Attribution-NoDerivs.	Common Gull, Larus canus Rubund Creative Commons Attribution ShareAlike.
Ring-billed Gull, Larus delawarensis "Ring-billed Gull LMO 7-15-09" by THE Holy Hand Grenade! via Flickr, Creative Commons Attribution-NoDerivs.	Lesser Black-backed Gull, Larus fuscus "Gaviota sombría Larus fuscus" by Agpov via Flickr, Creative Commons Attribution.
Great Black-backed Gull, Larus marinus Rubund Creative Commons Attribution ShareAlike.	Western Gull, Larus occidentalis Rubund Creative Commons Attribution ShareAlike.
Laughing Gull, Leucophaeus atricilla "Laughing Gull" by Glyn Lowe Photoworks via Flickr, Creative Commons Attribution.	Ivory Gull, Pagophila eburnea "Ivory Gull - Pagophila eburnea - Ísmáfur" by Omarrun via Flickr, Creative Commons Attribution.
Ross's Gull, Rhodostethia rosea "Ross's Gull (Rhodostethia rosea)" by Dominic Sherony via Flickr, Creative Commons Attribution ShareAlike.	Black-legged Kittiwake, Rissa tridactyla "Black-legged Kittiwake" by Seabamirum via Flickr, Creative Commons Attribution.
Black Skimmer, Rynchops niger "Black Skimmers" by Matt Tillett via Flickr, Creative Commons Attribution.	Stercorarius antarctica "Brown Skua landing near a penguin colony" by Liam Q via Flickr, Creative Commons Attribution ShareAlike.
South Polar Skua, Stercorarius maccormicki "South Polar Skua, 20 miles offshore of Vancouver Id., British Columbia, July 3, 2010" by Larus10 via Flickr, Creative Commons Attribution.	Arctic Skua, Stercorarius parasiticus "Arctic Skua (Stercorarius parasiticus)" by Billy Lindblom via Flickr, Creative Commons Attribution.
Stercorarius pomarinus "Pomarine Jaeger in Flight I" by Jomilo75 via Flickr, Creative Commons Attribution.	Great Skua, Stercorarius skua "Große Raubmöwe" by Ulrich Latzenhofer via Flickr, Creative Commons Attribution ShareAlike.
White Tern, Gygis alba "White Tern" by Angrysunbird via Flickr, Creative Commons Attribution ShareAlike.	Larosterna inca Rubund Creative Commons Attribution ShareAlike.
Common Tern, Sterna hirundo "Common Tern (Sterna hirundo)" by Ian.white1 via Flickr, Creative Commons Attribution-NoDerivs.	Arctic Tern, Sterna paradisaea Rubund Creative Commons Attribution ShareAlike.
Royal Tern, Thalasseus maximus "Royal Tern (Thalasseus maximus syn. Sterna maxima), Morro Strand State Beach, Morro Bay, CA" by Mikebaird via Flickr, Creative Commons Attribution.

Taxonomy:

Fam. Auk, Alcidae

Gen. Aethia (Add)

Aethia cristatella (Add)
Aethia psittacula (Add)
Aethia pusilla (Add)
Aethia pygmaea (Add)

Gen. Alca (Add)

Razorbill, Alca torda

Gen. Alle (Add)

Little Auk, Alle alle

Gen. Brachyramphus (Add)

Brachyramphus brevirostris (Add)
Brachyramphus marmoratus (Add)
Brachyramphus perdix (Add)

Gen. Cepphus (Add)

Cepphus carbo (Add)
Cepphus columba (Add)
Black Guillemot, Cepphus grylle

Gen. Cerorhinca (Add)

Cerorhinca monocerata (Add)

Gen. Fratercula (Add)

Atlantic Puffin, Fratercula arctica

Fratercula cirrhata (Add)
Fratercula corniculata (Add)

Gen. Pinguinus (Add)

Great Auk, Pinguinus impennis (Add)

Gen. Ptychoramphus (Add)

Ptychoramphus aleuticus (Add)

Gen. Synthliboramphus (Add)

Synthliboramphus antiquus (Add)
Synthliboramphus craveri (Add)
Synthliboramphus hypoleucus (Add)
Synthliboramphus scrippsi (Add)
Synthliboramphus wumizusume (Add)

Gen. Uria (Add)

Common Guillemot, Uria aalge

Brünnich's Guillemot, Uria lomvia

Fam. Gull, Laridae

Gen. Chroicocephalus (Add)

Chroicocephalus brunnicephalus (Add)
Chroicocephalus bulleri (Add)
Grey-hooded Gull, Chroicocephalus cirrocephalus (Add)
Chroicocephalus genei (Add)
Chroicocephalus hartlaubii (Add)
Chroicocephalus maculipennis (Add)
Chroicocephalus novaehollandiae (Add)
Chroicocephalus philadelphia (Add)
Black-headed Gull, Chroicocephalus ridibundus

Chroicocephalus scopulinus (Add)
Chroicocephalus serranus (Add)

Gen. Creagrus (Add)

Swallow-tailed Gull, Creagrus furcatus

Gen. Hydrocoloeus (Add)

Little Gull, Hydrocoloeus minutus

Gen. Ichthyaetus (Add)

Ichthyaetus audouinii

Ichthyaetus hemprichii (Add)
Ichthyaetus ichthyaetus (Add)
Ichthyaetus leucophthalmus (Add)
Ichthyaetus melanocephalus (Add)
Ichthyaetus relictus (Add)

Gen. Larus (Add)

European Herring Gull, Larus argentatus

Larus armenicus (Add)
Larus atlanticus (Add)
Larus belcheri (Add)
Larus cachinnans (Add)
Larus californicus (Add)
Common Gull, Larus canus

Larus crassirostris (Add)
Ring-billed Gull, Larus delawarensis

Larus dominicanus (Add)
Lesser Black-backed Gull, Larus fuscus

Larus glaucescens (Add)
Iceland Gull, Larus glaucoides (Add)
Larus heermanni (Add)
Glaucous Gull, Larus hyperboreus (Add)
Larus livens (Add)
Great Black-backed Gull, Larus marinus

Larus michahellis (Add)
Western Gull, Larus occidentalis

Larus pacificus (Add)
Larus schistisagus (Add)
Larus smithsonianus (Add)
Larus thayeri (Add)

Gen. Leucophaeus (Add)

Laughing Gull, Leucophaeus atricilla

Leucophaeus fuliginosus (Add)
Leucophaeus modestus (Add)
Leucophaeus pipixcan (Add)
Leucophaeus scoresbii (Add)

Gen. Pagophila (Add)

Ivory Gull, Pagophila eburnea

Gen. Rhodostethia (Add)

Ross's Gull, Rhodostethia rosea

Gen. Rissa (Add)

Rissa brevirostris (Add)
Black-legged Kittiwake, Rissa tridactyla

Gen. Saundersilarus (Add)

Saundersilarus saundersi (Add)

Gen. Xema (Add)

Sabine's Gull, Xema sabini (Add)

Fam. Skimmer, Rynchopidae

Gen. Rynchops (Add)

Indian Skimmer, Rynchops albicollis (Add)
African Skimmer, Rynchops flavirostris (Add)
Black Skimmer, Rynchops niger

Fam. Skua, Stercorariidae

Gen. Stercorarius (Add)

Stercorarius antarctica

Stercorarius chilensis (Add)
Pomarine Skua, Stercorarius longicaudus (Add)
South Polar Skua, Stercorarius maccormicki

Arctic Skua, Stercorarius parasiticus

Stercorarius pomarinus

Great Skua, Stercorarius skua

Fam. Tern, Sternidae

Gen. Anous (Add)

Anous minutus (Add)
Anous stolidus (Add)
Anous tenuirostris (Add)

Gen. Chlidonias (Add)

Chlidonias albostriatus (Add)
Chlidonias hybridus (Add)
Chlidonias leucopterus (Add)
Chlidonias niger (Add)

Gen. Gelochelidon (Add)

Gelochelidon nilotica (Add)

Gen. Gygis (Add)

White Tern, Gygis alba

Gygis microrhyncha (Add)

Gen. Hydroprogne (Add)

Hydroprogne caspia (Add)

Gen. Larosterna (Add)

Larosterna inca

Gen. Onychoprion (Add)

Onychoprion aleuticus (Add)
Onychoprion anaethetus (Add)
Onychoprion fuscatus (Add)
Onychoprion lunatus (Add)

Gen. Phaetusa (Add)

Phaetusa simplex (Add)

Gen. Procelsterna (Add)

Procelsterna albivitta (Add)
Procelsterna cerulea (Add)

Gen. Sterna (Add)

Sterna acuticauda (Add)
Sterna albifrons (Add)
Sterna albostriata (Add)
Sterna anaethetus (Add)
Sterna antillarum (Add)
Sterna aurantia (Add)
Sterna balaenarum (Add)
Sterna bengalensis (Add)
Sterna bergii (Add)
Sterna bernsteini (Add)
Sterna dougallii (Add)
Sterna elegans (Add)
Sterna forsteri (Add)
Sterna fuscata (Add)
Sterna hirundinacea (Add)
Common Tern, Sterna hirundo

Sterna lorata (Add)
Sterna maxima (Add)
Sterna nereis (Add)
Arctic Tern, Sterna paradisaea

Sterna repressa (Add)
Sterna sandvicensis (Add)
Sterna saundersi (Add)
Sterna striata (Add)
Sterna sumatrana (Add)
Sterna superciliaris (Add)
Sterna trudeaui (Add)
Sterna virgata (Add)
Sterna vittata (Add)

Gen. Thalasseus (Add)

Thalasseus bergii (Add)
Thalasseus elegans (Add)
Royal Tern, Thalasseus maximus

Thalasseus sandvicensis (Add)